It's my opinion that the Bishop would have been more effective (from her perspective) to preach the message of Christ (love, compassion, empathy, etc.) without the lecture. Let him hear the message and let him connect the dots and perhaps, change his mind. No one (certainly not Trump) responds well to being lectured to and told what to do and what not do. Why not be a bit more subtle and less MSNBC.
As I have said, it was a religious service in the National Cathedral as part of the official Inauguration ceremony. I'm expressing an opinion that a lecture to POTUS in that setting is not appropriate for a Bishop presiding over an official setting.
She chose to lecture and nag POTUS and be a liberal hero for a day. That's her right I get it. Trump and his party, for their part, sat there and were respectful.